When I want to conclude a Series of results in  (_math_) context, I use "_Hence, Therefore, So_, _Then_ ...", trying not to repeat them ; For example I don't write "A so B so C so..."; instead I write "A So B then C Hence...".   
("A", "B" and "C" can be a short sentence, like _"a < b"_, or can be as big as a _paragraph_).
  
**Question 1**. What is  the **differences** among these words? Is there any **priority** using them in various places of context?  
**Question 2.** can you add some other words like "Hence, Therefore, So, Then ...", (noting priority)?    

Thank you.